:root{color-scheme:dark;--bg:#0b0e12;--panel:#151a21;--text:#f4f7fa;--muted:#8f9aa8;--line:#29323d;--green:#2ee27d;--red:#ff5967;--blue:#65a8ff;--amber:#ffc95a}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 50% -20%,#182231 0,#0b0e12 44%);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;min-height:100vh}
.shell{max-width:680px;margin:auto;padding:52px 22px}.brand{display:flex;align-items:center;gap:14px;margin-bottom:22px}.mark{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:#fff;color:#090c10;font-weight:900}.brand h1{font-size:22px;margin:0}.brand p{margin:3px 0 0;color:var(--muted);font-size:13px}
.card{background:rgba(21,26,33,.96);border:1px solid var(--line);border-radius:22px;padding:34px;text-align:center;box-shadow:0 30px 80px rgba(0,0,0,.3)}.status-icon{font-size:30px;color:var(--blue)}h2{font-size:30px;margin:14px 0 8px}#message{color:var(--muted);min-height:24px}
.progress{height:12px;background:#090c10;border-radius:999px;overflow:hidden;margin:28px 0 8px}#bar{height:100%;width:0;background:var(--blue);transition:width .2s}.progress-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:12px}
button{margin-top:28px;border:0;border-radius:14px;padding:16px 28px;background:var(--green);color:#07130b;font-size:16px;font-weight:850;cursor:pointer;min-width:230px}button:disabled{opacity:.4;cursor:not-allowed}.hint{font-size:12px;line-height:1.5;margin:20px auto 0;max-width:480px}
details{margin-top:18px;color:var(--muted);font-size:12px}summary{cursor:pointer;text-align:center}pre{background:#07090c;border:1px solid #202832;border-radius:14px;padding:15px;height:220px;overflow:auto;white-space:pre-wrap;font:11px/1.45 ui-monospace,SFMono-Regular,Menlo,monospace;color:#b7c1cc}
.card.success{border-color:#236442}.card.success .status-icon,h2.success{color:var(--green)}.card.error{border-color:#73313a}.card.error .status-icon{color:var(--red)}